Yeah, I don't really think of the Temple as being corruptive, but I don't see it as being good for Cait personally, I just think it'd be something she'll end up not being satisfied with, tying her down and limiting her to that area, and Hawkthorne.
I think she's best living her life free for now, learning new things and furthering her magic, that she's shown to have a passion about.
Plus as shown in game, the politicking involved would be terrible for her to get further involved with, considering her moms already in trouble.